Download or read book Fretting Resistant Coatings for Titanium Alloys written by Donulus J. Padberg and published by . This book was released on 1971 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report describes a program undertaken to establish the effect of airframe design parameters upon the severity of fretting in titanium structures and to determine the ability of selected coatings to prevent fretting induced fatigue failures. A test specimen was designed to simulate a structural joint and a series of fatigue tests was performed to determine the conditions most conducive to fretting initiated failure. It was found that at low stress levels and using tapered interference fit fasteners, the number of fatigue cycles accumulated to the point that fractures originated from fretting damage. A survey was made of titanium coatings technology and testing and three coatings were selected. On the basis of their properties and minimal degradation of Ti-6Al-6V-2Sn fatigue resistance, a chemical conversion coating and a commercial anodize coating were chosen along with a dry film lubricant. Fatigue tests were made of Ti-6Al-6V-2Sn specimens protected by the coatings from Task II. The coatings essentially eliminated the fretting induced fatigue failures of Task I. Final coating performance verification tests on Ti-6Al-4V and Ti-6Al-2Sn-4Zr-6Mo specimens demonstrated the same improvement using dry film lubricant applied to a shot peened surface. (Author).
Download or read book Selected fretting wear resistant coatings for titanium 6 percent aluminum 4 percent vanadium alloy written by Robert C. Bill and published by . This book was released on 1976 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wear and Fretting Fatigue Resistant Coatings for Titanium Alloys written by Robert K. Betts and published by . This book was released on 1974 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies were performed to identify treatments to alleviate the effects of wear on fatigue properties of Ti-6Al-4V, Ti-5Al-4Mo-4Cr-2Sn-2Zr (Ti-17) and Ti-8Al-1Mo-1V. The mechanisms of wear studied were fretting fatigue and sliding wear fatigue. Fretting fatigue tests were performed using high cycle fatigue specimens with shoes bolted across the gauge sections at 25,000 psi contact pressure. The shoes induced fretting as the result of alternating bending strain motion along the edges of the contact interface. Sliding wear fatigue tests were performed by a two-step method including first the cyclic rubbing of fatigue specimens by wear shoes for 10,000 strokes of 5 mils length under 50,000 psi contact pressure. Subsequently, the specimens were tested in low cycle or high cycle fatigue to determine the effect of wear on the endurance limit. In fretting tests of Ti-6Al-4V at room temperature, and of Ti-6Al-4V and Ti-17 at 650F, a Cu shim insert between the specimen/shoe interface inhibited fretting fatigue. In sliding wear tests of all three Ti alloys at room temperature, a plasma sprayed coating of Al-bronze containing 10% carburundum polyimide prevented loss of fatigue strength. The Al-bronze/carburundum polyimide not only protected fatigue specimens to which it was applied, but also it did not cause damage to uncoated fatigue specimens against which it was rubbed. Other coatings and surface treaments evaluated did not afford complete wear protection.
Download or read book Wear Resistant Coatings for Titanium Alloys Fretting Fatigue of Uncoated Ti 6Al 4V written by R. K. Betts and published by . This book was released on 1971 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the work was to define and establish conditions of fretting wear on uncoated, shot-peened Ti-6Al-4V under which conditions fatigue effects may be expected in aircraft gas turbine engine compressor applications. The study was divided into two tasks, each concerning a specific wear phenomenon and resulting fatigue effects. Task 1 involved classic fretting fatigue between bolted surfaces relating to aircraft compressor disc assemblies. Task 2 involved studies of wear simulating that between surfaces of dovetails, in which contact pressure and displacement are related to dynamic loads.
Download or read book Fretting Wear Resistant Micro Arc Oxidation Coatings for Aluminum and Titanium Alloy Bearings Preprint written by and published by . This book was released on 2007 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report was developed under a SBIR contract, and has been released to the public by Infoscitex. Aluminum and titanium alloys are used as replacements for steel in gear boxes of aircraft and helicopters in both military and commercial air vehicles, due to their low density, mechanical strength and thermal conductivity. However, these alloys are susceptible to fretting wear when matched to harder steel surfaces under high loads at elevated temperatures. Anodized coatings are too thin and porous to protect these metals. Infoscitex applied a proprietary micro-arc oxidation process to produce hard, thick, and adherent oxide coatings on aluminum and titanium alloys that rendered the coated metal components resistant to fretting type wear. Selected aluminum and titanium alloy test specimens were micro-arc treated then measured for surface hardness, roughness, and adhesion to metal substrate. Block-on-Ring fretting wear tests on polished test specimens against M-50 steel were conducted in the presence of lubricant, under high loading, at ambient and 400 degrees F temperatures. Coefficient of friction and wear volume were measured versus number of test cycles. The results of efforts to improve the fretting wear resistance of aluminum and titanium alloy bearings for use in aircraft gear box applications will be discussed.
Download or read book NASA Technical Note written by and published by . This book was released on 1976 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fretting Fatigue written by Steven E. Kinyon and published by ASTM International. This book was released on 2003 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains 29 contributions drawn from the Third International Symposium on Fretting Fatigue held in Nagaoka, Japan in May 2001. Sections of the volume address fretting wear and crack initiation; fretting fatigue crack and damage; life prediction; fretting fatigue parameter effects; loading condition
Download or read book Selected Fretting wear resistant Coatings for Titanium 6 percent akluminium 4 percent vanadium Alloy Aviation Airplanes written by Robert C. Bill and published by . This book was released on 1976 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Standardization of Fretting Fatigue Test Methods and Equipment written by Mahmoud Helmi Attia and published by ASTM International. This book was released on 1992 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Advanced Coatings as Palliatives for Avoidance of Fretting and Galling in Titanium Alloy written by and published by . This book was released on 2001 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report has been developed under a SBIR contract for Topic AF00-167. The titanium (Ti) turbine engine components such as blades and discs are susceptible to fretting related damage and therefore is a major concern for U.S. Air Force. The purpose of the Phase I work was to develop advanced multifunctional coatings as palliatives for mitigating the fretting related damage in titanium alloy and to rationalize the fretting damage with finite element analysis. Vacuum filtered arc and magnetron sputtering techniques were used to develop various coatings. The composition and structure of the developed coatings were thoroughly characterized. Fretting wear and friction behavior of the coatings deposited on Ti alloy was evaluated in a reciprocating pin-on-flat configuration with small displacement amplitude. Most of the coatings showed considerable promise in mitigating fretting wear. Limited fretting fatigue tests were also conducted on coated specimens. So far no improvement in the fatigue life of coated specimens was found. Based on finite element analysis an expression was developed which may help in selecting suitable coatings for enhanced fatigue life.
Download or read book Medical Applications of Titanium and Its Alloys written by Jack E. Lemons and published by ASTM International. This book was released on 1996 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thirty papers presented at a 1994 symposium cover the basic materials science issues regarding the processing of titanium alloys, and the controversy regarding their use in medicine. Coverage includes orthopaedic, dental, and cardiovascular applications, with a primary focus on the orthopaedic. Info
Download or read book High Temperature Alloys for Gas Turbines 1982 written by R. Brunetaud and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 1060 pages. Available in PDF, EPUB and Kindle. Book excerpt: The European Collaborative Programme on Materials for Gas Turbines known as COST-50 was initiated in 1971 and has been supported since then by the Commission of European Communities. The achievements made during the first phase of COST-50 were reviewed at the Conference held in Liege, September 25-27, 1978 and published by Applied Science Publishers Ltd. Nine European Countries : Austria, Belgium, the Federal Republic of Germany, France, Italy, The Netherlands, Sweden, Switzerland, the United Kingdom, and the Joint Research Center of the Community, agreed to continue their participation in COST-50 and the results of the second phase were presented at the Conference held in Liege, October 4-6, 1982 under the following headings : - Corrosion and Coatings - Fatigue, Creep and Structural Stability - Processing The technical sessions consisted of invited papers reviewing recent progress in the development of high temperature alloys with particular emphasis on the results of the European Collaborative Programme. Furthermore, some areas were reviewed by eminent speakers from the United States of America, due to their expertise in their respective fields. In this context and as a tradition introduced in 1978, the keynote lecture "Superalloys technology : today and tomorrow" was del ivered by Dr. F. L. Versnyder. The Conference was completed with a significant Poster Session comprising about fifty contributions from Europe and elsewhere. This book comprises a total of fifty four contributions representing almost all of the papers delivered at the technical sessions and a large part of the presentations made at the Poster Session.
Download or read book Titanium Science and Technology written by H. Burte and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shreir s Corrosion written by and published by Elsevier. This book was released on 2009-02-27 with total page 3652 pages. Available in PDF, EPUB and Kindle. Book excerpt: This four-volume reference work builds upon the success of past editions of Elsevier’s Corrosion title (by Shreir, Jarman, and Burstein), covering the range of innovations and applications that have emerged in the years since its publication. Developed in partnership with experts from the Corrosion and Protection Centre at the University of Manchester, Shreir’s Corrosion meets the research and productivity needs of engineers, consultants, and researchers alike. Incorporates coverage of all aspects of the corrosion phenomenon, from the science behind corrosion of metallic and non-metallic materials in liquids and gases to the management of corrosion in specific industries and applications Features cutting-edge topics such as medical applications, metal matrix composites, and corrosion modeling Covers the benefits and limitations of techniques from scanning probes to electrochemical noise and impedance spectroscopy
Download or read book Literature Review and Preliminary Studies of Fretting and Fretting Fatigue Including Special Applications to Aircraft Joints written by David Hoeppner and published by . This book was released on 1994 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Woldman s Engineering Alloys written by John P. Frick and published by ASM International. This book was released on 2000-01-01 with total page 1369 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation New edition of a reference that presents the values of properties typical for the most common alloy processing conditions, thus providing a starting point in the search for a suitable material that will allow, with proper use, all the necessary design limitations to be met (strength, toughness, corrosion resistance and electronic properties, etc.) The data is arranged alphabetically and contains information on the manufacturer, the properties of the alloy, and in some cases its use. The volume includes 32 tables that present such information as densities, chemical elements and symbols, physical constants, conversion factors, specification requirements, and compositions of various alloys and metals. Also contains a section on manufacturer listings with contact information. Edited by Frick, a professional engineering consultant. Annotation c. Book News, Inc., Portland, OR (booknews.com).
Download or read book Coatings for Biomedical Applications written by Mike Driver and published by Elsevier. This book was released on 2012-02-22 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: The biomaterials sector is rapidly expanding and significant advances have been made in the technology of biomedical coatings and materials, which provide a means to improve the wear of joints, change the biological interaction between implant and host and combine the properties of various materials to improve device performance. Coatings for biomedical applications provides an extensive review of coating types and surface modifications for biomedical applications. The first part of the book explores a range of coating types and their biomedical applications. Chapters look at hydrophilic, mineral and pyrolytic carbon coatings in and ex vivo orthopaedic applications and finally at surface modification and preparation techniques. Part two presents case studies of orthopaedic and ophthalmic coatings, and biomedical applications including vascular stents, cardiopulomonary by-pass equipment and ventricular assist devices. With its clear structure and comprehensive review of research, Coatings for biomedical applications is a valuable resource to researchers, scientists and engineers in the biomedical industry. It will also benefit anyone studying or working within the biomedical sector, particularly those specialising in biomedical coatings. Provides an extensive review of coating types and surface modifications for biomedical applications Chapters look at hydrophilic coatings for biomedical applications in and ex vivo, mineral coatings for orthopaedic applications, pyrolytic carbon coating and other commonly-used biomedical coatings Presents case studies of orthopaedic and ophthalmic coatings, and biomedical applications including vascular stents, cardiopulomonary by-pass equipment and ventricular assist devices
